Low Voltage Electrical Knock Down Cabinet / distribution switch box / switchgear and switchboard
Application
MNS2.0 modular low-voltage switchgear system is for all power generation,distribution and power use sites such as:
- Main/auxiliary power cabinet,power distribution cabinet
- Motor power supply and motor control center
- Open loop or closed loop control system electronic cabinet
- Power system
- Petrochemical
- Industrial and mining enterprises
- Public utilities
- Municipal engineering and commercial buildings
Feature of MNS2.0 System
In the competitive domestic and international market,the MNS2.0 modular low-voltage switchgear has led the mainstream development direction of the switchboard with its years of successful experience.The whole system takes full account of the future development space,and the advanced technology has been in the leading position in this field,with far-reaching foresight.
The frame structure adopted by MNS2.0 system is highly flexible,and once assembled, it no longer needs servicing.Different standard components can be installed in the cabinet to meet various usage requirement .Due to the whole system including electrical structure adopts the modular design,this kind of optimization structure designs meet the requirement of the various components,and is suitable for various working environment and achieve the corresponding protection grade.
MNS 2.0 system has more advantages than the traditional products.
- Compact structure and save the volume of cabinet.
- The cabinet can be arranged back-to-back.
- Get one more economical distribution circuit layout.
- Select standard components to facilitate the design of engineers.
- Complete series standardization.
- According to the different requirements of work and environment, the cabinet with corresponding protection grade can be designed.
- Different types of functional components can be freely installed in a cabinet,such as fixed components and extraction components.
- Improvement of equipment is convenient.
- Equipment operation continuity and reliability.
- Operators are more secure in their personal safety.
The technical standards
The MNS2.0 system is a modular low-voltage switchgear (TTA) according to the standards of IEC61439-2-2011 and GB7251.12-2013.The installation and connection of the system is performed according to IEC364 and DIN VDE0105 standard.
Work and environmental conditions
MNS2.0 low voltage switchgear is one kind of electrical equipment that is suitable for indoor installation, and the protection level of switchgear under other working conditions can be reached to IP54.
Ambient temperature.
| The short-term maximum temperature: | +40℃ |
| The 24-hour maximum average temperature: | +35℃ |
| The minimum temperature: | -5℃ |
The equipment should be run with reduced capacity once the ambient temperature is higher than the above.
All operations should be complied with the manufacture's requirement under working conditions such as measuring,measuring instrument and protective relays and so on.
Environmental conditions
- When working normally,the detailed climate environment should be referenced to provisions of IEC60439-1,EN60439,Part 500 in VDE0660.And the ambient humidity is 50% in 40℃.
- The conditions of the indoor installation of the switchgear shall meet the requirements of the corresponding standards. In the case of condensation, ventilation or heating lamp will be used to prevent condensation.
- If the switchgear is installed in the areas whose altitude is above 2000 meters, the equipment should be operated with reduced capacity accordingly.
The technical data
| Standards | The modular switchgears passed type approval(TTA)* | GB 7251.12-2013/IEC 61439-2:2011 |
| The electrical parameters |
| Rated insulation voltage Ui | 1000V/AC |
| Rated working voltage Ue | 690V/AC |
| Rated impulse tolerance voltage Uimp | 12KV |
| Overvoltage grade | IV |
| Pollution levels | 3 |
| Rated frequency | to 60Hz |
| The main busway |
| Rated current Ie | to 6300A |
| Rated peak tolerance current Ipk | to 220KA |
| Rated short-term tolerance current Icw | to 100KA |
| The power distribution |
| Rated current Ie | to 1200A(2000A) |
| Rated peak tolerance current Ipk | to 110KA(176KA) |
| Rated short-term tolerance current Icw | to 50KA(80KA) |
| The characteristics of structure |
| Cabinet and support components | DIN41488 |
| Recommended height | 2200mm |
| Recommended width | 400,600,800,1000,1200mm |
| Recommended depth | 600,800,1000,1200mm |
| Modules(According with DIN43660) | E=25mm |
| Internal isolation form | to Form 4 |
| Protection grade(According with IEC529 or DIN41050) | From IP30 to IP54 |
*TTA stands for a confirmed model or series of low-voltage switchgears and control equipments,whose performances are completely the same with those kinds of complete sets of equipments that have passed the verifications that totally conform to corresponding standards,and no any differences that may affect performance exist.
The designs for structure
Frames
The basic parts of MNS2.0 system frame are the C-shaped framework with 25mm interval holes for modules(According with DIN43660).
The standard module value for MNS system is E=25mm,because of adopting the standard module hole system,Framework structures can be assembled into various types of cabinets without any special tools,such as frontally-operation type of switchgears,back-to-back type with single set of switchgears and back-to-back combination with multiple sets of switchgears.
The shell
The shell of MNS2.0 system can be designed with different protection levels according to different usage requirements.The shell of IP30 can be chosen for back-operation type of switchgears and united-screen type of switchgears.The protection grade for totally enclosed ones can be from IP40 to IP54(All of draw-out type of switchgears are fully enclosed structure.)Hinge-type framework can be used for the installation of electronic device and the dash board or as the device frameworks.The mounting position of the hinged frames can be mounted with/without the covers for observation holes.The base plates can be provided for the bottom of cabinets,and the base plates mounted with flange plates can be used for installation of cable troughs.The door plates and shell plates can be fitted with single/multiple vent holes,and the roof plates of switchgears can be fully ventilated(suitable for IP40 and IP41’s ones).
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